@Steve68 and supercity88. I agree with you both.
Yes we did allow Palace chances, let's not forget they are a decent side and their wingers are a threat to any team.
With regards Toure, he struggles more when Silva is missing. He and Silva keep the ball so well, Barcelona style so breaks through midfield are few and far between.
That in my opinion has been the key to our success, Silva helps us retain the ball, hence less defending and he and Toure have to be watched at all time. Add Nasri to that and teams will only ever win the ball back so deep in their own half that there is a long way to go before a chance is created.
Swap Silva & Nasri for De Bruyne and Sterling the whole shape and systems changes. Both Sterling and De Bruyne are more likely to relinquish possession and expose our defence. If the full backs are pushed on, even more so.
Toure in the early weeks looked back to his very best, with Silva being in and out of the side, Nasri being out of the side he doesn't look quite the same.
Last night there were signs that De Bruyne was happy to just retain possession with Ya Ya, Bony and Iheanacho rather than his instictive forward first thinking.
Return Silva to the side, you will see Ya Ya still has plenty to offer.
Silva, Ya Ya and Fernandinho have everything for a midfield three. Hence all the clean sheets we keep.